/Engine/Plugins/Experimental/MeshModelingToolsetExp/Source/MeshModelingToolsEditorOnlyExp/Public/BspConversionTool.h
Actor movements include any transform changes, and change both the preview and the cached brushes. It shouldn't affect BrushesToConvert or bCanAccept.
void OnEditorActorMoved ( [AActor](API\Runtime\Engine\GameFramework\AActor) * InActor )